[sdiy] Simple clip detect LED circuit

[xamboldt]

There's a pretty straightforward solution in Scott Juskiw's  
veeblefetzer:

http://www.tellun.com/motm/diy/tln904/TLN-904.html


On May 1, 2006, at 9:46 PM, Seb Francis wrote:

> John Luciani wrote:
>> On 5/1/06, Seb Francis <seb at burnit.co.uk> wrote:
>>
>>> Maybe I will look again at trying to free up another I/O pin.  I've
>>> already had to multiplex the SRAM addressing via a latch due to I/O
>>> shortages.  The only other possibility that occurs to me now is  
>>> to use
>>> the Latch Enable signal to select which LED is to be driven.  I  
>>> wonder
>>> if it would be ok to drive the clip LEDs at 48,000kHz?  I don't  
>>> think
>>> it's ideal from a noise point of view ...
>>>
>>> Seb
>>
>> Rather than driving the clip LEDs at 48KHz you could drive the one- 
>> shot.
>> The one-shot should reduce the distance the 48KHz travels